What is fog?

Fog appears with temperature change, always from cold to hot environment.

The ambient humidity condenses into tiny droplets commonly called "fog". Fog is made of many tiny water droplets.


What creates fog?


  • The temperature difference between the two environments
  • Relative humidity in the hot environment entered by the glass wearer
  • Time of exposure allowing the lenses to adopt to the temperature


How does the Optifog process work?

  • Step 1 : Fog is made of many tiny water droplets
  • Step 2 : Thanks to Optifog lenses properties, they will perfectly spread on the lens surface
  • Step 3 : And they will create a uniform film of water, invisible to the wearer


When do the anti-fog properties might need to be re-activated?

Most water based liquids remove the molecules of the Optifog Activator Cloth
Heavy rain may remove it as well

If you notice your lenses is not fog repellent enough: Simply reactivate it with the Optifog Activator Cloth


Hwo does the Optifog Activator Cloth work on other lenses?

The anti-fog performance :

  • Won’t be as efficient in terms of fog prevention
  • Won’t be as durable

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What are the other benefits of Crizal UV with Optifog?

  • Fog repellence ***
  • Dust repellence ***
  • Smudge resistance *
  • Scratch resistance ***
  • AR efficiency ***


If need more information about Crizal product, please click here.